:root {
      color-scheme: light;
      --ink: #15233c;
      --muted: #5d6b80;
      --blue: #1558d6;
      --blue-dark: #103f9b;
      --sky: #eaf2ff;
      --line: #dce5f2;
      --paper: #ffffff;
      --wash: #f4f7fc;
      --teal: #087e82;
      --orange: #bd5b24;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: linear-gradient(180deg, #f5f8ff 0%, #fff 36%, #f4f8fc 100%);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid rgba(220,229,242,.9);
      backdrop-filter: blur(12px);
    }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; font-size: 18px; font-weight: 800; }
    .brand img { width: 42px; max-height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 12px 11px; color: #43536c; font-size: 14px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--blue); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); padding: 9px 12px; border-radius: 5px; cursor: pointer; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 11px 19px; border: 1px solid transparent; border-radius: 5px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; cursor: pointer; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(21,88,214,.18); }
    .button-primary { background: var(--blue); color: white; }
    .button-primary:hover { background: var(--blue-dark); }
    .button-outline { border-color: #9db6e5; color: var(--blue-dark); background: #fff; }
    .button-light { background: #fff; color: var(--blue-dark); }
    .hero { position: relative; overflow: hidden; background: #e8f1ff; border-bottom: 1px solid #d5e3fb; }
    .hero::before, .hero::after { position: absolute; content: ""; pointer-events: none; }
    .hero::before { width: 530px; height: 530px; right: -110px; top: -250px; border: 1px solid rgba(21,88,214,.18); border-radius: 50%; box-shadow: 0 0 0 38px rgba(21,88,214,.035), 0 0 0 78px rgba(21,88,214,.025); }
    .hero::after { width: 220px; height: 220px; right: 13%; bottom: -160px; border: 1px solid rgba(8,126,130,.27); transform: rotate(45deg); }
    .hero-inner { position: relative; z-index: 1; padding-block: 76px 64px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { margin: 0 0 14px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1 { max-width: 700px; margin: 0; font-size: clamp(36px, 6vw, 64px); line-height: 1.12; letter-spacing: 0; }
    .hero-lead { max-width: 690px; margin: 20px 0 0; color: #43536c; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .hero-points { display: flex; flex-wrap: wrap; gap: 12px 25px; margin: 24px 0 0; padding: 0; list-style: none; color: #314664; font-size: 14px; }
    .hero-points li::before { content: "✓"; color: var(--teal); font-weight: 900; margin-right: 8px; }
    .hero-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; max-width: 850px; margin-top: 49px; border-top: 1px solid #c6d7f0; }
    .hero-stat { padding: 18px 16px 0 0; }
    .hero-stat strong { display: block; color: var(--blue-dark); font-size: 19px; }
    .hero-stat span { color: var(--muted); font-size: 13px; }
    .section { padding-block: 76px; }
    .section-tint { background: #eef4fc; border-block: 1px solid #e0e9f5; }
    .section-heading { max-width: 720px; margin-bottom: 33px; }
    .section-heading h2 { margin: 0; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    .section-heading p { margin: 12px 0 0; color: var(--muted); }
    .section-kicker { margin: 0 0 9px; color: var(--teal); font-size: 13px; font-weight: 800; }
    .intro-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
    .intro-text p { margin: 0 0 15px; color: #43536c; }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 20px; margin: 22px 0 0; padding: 0; list-style: none; }
    .feature-list li { border-top: 1px solid var(--line); padding: 12px 0; font-weight: 700; }
    .feature-list span { display: block; color: var(--muted); font-size: 13px; font-weight: 400; }
    .model-panel { border-left: 3px solid var(--blue); padding: 6px 0 8px 22px; }
    .model-panel h3 { margin: 0 0 12px; font-size: 18px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-cloud span { padding: 6px 10px; background: #fff; border: 1px solid #d9e4f3; color: #40536f; font-size: 13px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-item { padding: 21px 20px; background: #fff; border-top: 2px solid #b8cdf0; transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover, .case-item:hover, .quote:hover { transform: translateY(-3px); box-shadow: 0 12px 24px rgba(27,55,98,.08); }
    .service-item h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-index { display: block; margin-bottom: 11px; color: var(--teal); font-size: 12px; font-weight: 800; }
    .service-more { display: inline-block; margin-top: 11px; color: var(--blue); font-size: 13px; font-weight: 700; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; border-block: 1px solid var(--line); }
    .workflow article { position: relative; padding: 23px 22px 24px 0; counter-increment: step; }
    .workflow article:not(:last-child)::after { position: absolute; right: 14px; top: 37px; color: #8ca5cd; content: "→"; }
    .workflow article::before { content: "0" counter(step); display: block; margin-bottom: 13px; color: var(--blue); font-size: 14px; font-weight: 800; }
    .workflow h3 { margin: 0 0 6px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-band { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 35px; padding: 31px; background: #123c84; color: #fff; }
    .solution-band h2 { margin: 0; font-size: 25px; }
    .solution-band p { margin: 10px 0 0; color: #d8e5fb; }
    .solution-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; margin: 0; padding: 0; list-style: none; color: #f0f5ff; }
    .solution-list li::before { content: "•"; color: #80d4d2; margin-right: 9px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-item { overflow: hidden; background: #fff; border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .case-item img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: #e6edf7; }
    .case-item.square img { aspect-ratio: 1 / 1; object-fit: cover; }
    .case-caption { padding: 16px 18px 18px; }
    .case-caption h3 { margin: 0 0 5px; font-size: 17px; }
    .case-caption p { margin: 0; color: var(--muted); font-size: 14px; }
    .banner-gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 18px; }
    .banner-gallery img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: #e6edf7; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    .comparison { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid #e7edf5; }
    .comparison th { background: #edf4ff; color: #25456f; }
    .comparison td:first-child { font-weight: 700; }
    .comparison td:not(:first-child) { color: #42536a; }
    .rating-row { display: flex; flex-wrap: wrap; align-items: center; gap: 17px; margin-bottom: 22px; }
    .rating-score { color: var(--blue-dark); font-size: 38px; font-weight: 900; line-height: 1; }
    .rating-copy { color: var(--muted); }
    .stars { color: #bd6c18; letter-spacing: 0; font-size: 20px; }
    .pricing-note { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; margin-top: 18px; padding: 19px 22px; background: #e6f4f2; border-left: 3px solid var(--teal); }
    .pricing-note p { margin: 0; color: #244d51; }
    .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .quote { padding: 20px; background: white; border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .quote p { margin: 0 0 15px; color: #40516a; }
    .quote footer { color: var(--blue-dark); font-size: 13px; font-weight: 700; }
    .quote small { display: block; color: var(--muted); font-weight: 400; }
    .review-note { margin: 17px 0 0; color: var(--muted); font-size: 12px; }
    .network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 38px; align-items: start; }
    .network-grid h3 { margin: 0 0 10px; font-size: 20px; }
    .network-grid p { margin: 0 0 14px; color: var(--muted); }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-list a { min-height: 102px; display: flex; align-items: end; padding: 15px; background: #fff; border: 1px solid var(--line); color: var(--blue-dark); font-weight: 700; transition: border-color .2s ease, transform .2s ease; }
    .article-list a:hover { border-color: var(--blue); transform: translateY(-2px); }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 18px 42px 18px 0; font-weight: 700; cursor: pointer; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { position: absolute; right: 8px; content: "+"; color: var(--blue); font-size: 22px; line-height: 1; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 30px 18px 0; color: var(--muted); }
    .contact-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 44px; align-items: start; }
    .contact-info { padding-right: 12px; }
    .contact-info h2 { margin: 0 0 12px; font-size: 30px; }
    .contact-info p { color: var(--muted); }
    .contact-lines { margin: 20px 0 0; padding: 0; list-style: none; }
    .contact-lines li { padding: 7px 0; border-bottom: 1px solid var(--line); }
    .contact-lines strong { display: inline-block; min-width: 90px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; padding: 22px; background: #fff; border: 1px solid var(--line); }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #cbd7e6; border-radius: 3px; padding: 11px 12px; background: #fff; color: var(--ink); }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(21,88,214,.2); border-color: var(--blue); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-submit { grid-column: 1 / -1; justify-self: start; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 0; border-top: 1px solid var(--line); }
    .join-band h2 { margin: 0; font-size: 22px; }
    .join-band p { margin: 5px 0 0; color: var(--muted); }
    .site-footer { background: #e8eef7; color: #26364f; border-top: 1px solid #d7e0ed; }
    .footer-inner { padding-block: 34px 24px; }
    .footer-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 30px; }
    .footer-brand { max-width: 450px; }
    .footer-brand strong { font-size: 18px; }
    .footer-brand p { margin: 8px 0 0; color: #58677d; font-size: 14px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: flex-end; }
    .footer-links a { color: #344d70; font-size: 13px; }
    .footer-links a:hover { color: var(--blue); }
    .copyright { margin-top: 23px; padding-top: 15px; border-top: 1px solid #cfd9e7; color: #5c6c82; font-size: 12px; }
    .floating-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating-contact a, .floating-contact button { width: 48px; min-height: 48px; display: grid; place-items: center; border: 1px solid #c8d8f0; background: #fff; color: var(--blue-dark); font-weight: 800; box-shadow: 0 4px 16px rgba(19,47,89,.12); cursor: pointer; }
    .floating-contact a:hover, .floating-contact button:hover { background: #eaf2ff; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: none; }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
    }
    @media (max-width: 980px) {
      .header-inner { gap: 12px; }
      .menu-toggle { display: inline-flex; align-items: center; }
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 12px 20px 18px; flex-direction: column; align-items: stretch; background: white; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(24,47,82,.08); }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 10px 4px; border-bottom: 1px solid #eef2f8; }
      .nav-actions .button { min-height: 40px; padding: 8px 12px; font-size: 13px; }
      .intro-layout, .contact-layout { grid-template-columns: 1fr; gap: 30px; }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-inner { min-height: 68px; }
      .brand { font-size: 16px; gap: 8px; }
      .brand img { width: 36px; max-height: 36px; }
      .nav-links { top: 68px; }
      .nav-actions .button { display: none; }
      .hero-inner { padding-block: 57px 42px; }
      .hero-lead { font-size: 16px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); margin-top: 36px; row-gap: 8px; }
      .hero-stat { padding-top: 14px; }
      .section { padding-block: 55px; }
      .section-heading h2 { font-size: 27px; }
      .grid-3, .case-grid, .quotes { grid-template-columns: 1fr; }
      .feature-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .workflow article:nth-child(2)::after { content: ""; }
      .workflow article:nth-child(3)::after { content: "→"; }
      .solution-band { grid-template-columns: 1fr; padding: 24px 20px; }
      .banner-gallery { grid-template-columns: 1fr 1fr; }
      .network-grid { grid-template-columns: 1fr; gap: 28px; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 17px; }
      .field.full, .form-submit { grid-column: auto; }
      .join-band, .footer-top { align-items: flex-start; flex-direction: column; }
      .footer-links { justify-content: flex-start; }
      .floating-contact { right: 10px; bottom: 12px; }
      .floating-contact a, .floating-contact button { width: 42px; min-height: 42px; }
    }